The announcement eases fears that the competition could be canned following the NRL's relocation to Queensland in the wake of the Sydney Covid outbreak.

The six-team competition will now kick off the same week as the NRL grand final, with the delay giving clubs enough time to prepare for the campaign.

NRL chief executive Andrew Abdo said the decision to delay the season was in the best interests of the playing group.

"We are absolutely committed to the new six-team competition being played in 2021," Abdo said.

"The worsening COVID outbreak in NSW provides additional challenges to the NRLW because most of our players also have employment and other commitments outside of rugby league.

"We want players to have the opportunity to play NRLW without impacting their normal lives. By delaying kick-off until October it provides the best opportunity for a normal season."

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Mr Abdo said the game was planning a blockbuster start to the NRLW season.

"We're excited to kick-off in grand final week. It's our biggest week of the year and it will be fitting that the NRLW will be an important component of the week," he said.

"All eyes will be on the women's competition in October and that's a great outcome as we look to grow the competition.

"I want to thank the players, participating clubs and the RLPA for their contribution in reaching an outcome that is in the best interests of the players and the game more broadly."

It also follows the decision of the ARLC and NZRL to boycott the end-of-year World Cup that was set to begin in late October and feature the Jilllaroos and Kiwi Ferns.

Expansion clubs Parramatta, Newcastle and Gold Coast will play their inaugural seasons alongside foundation clubs Sydney Roosters, St George Illawarra and Brisbane.

Where the tournament will be played will be determined at a later date when COVID conditions closer to the scheduled kickoff are determined.